The unknowns behind the Excalibur Unleashed figures
Nobody knows when the wilds will land on both outer reels and start the free spins, and no bet size changes those odds. One session is random from start to finish, so the return figure describes a long run of play, not your hour on the machine. Budget for the spins, not for a result.
Two return figures exist for this game, and the differences are small. Which one you are playing appears only in the game's rules panel, so open it before you stake anything. Nothing on the lobby screen settles that question for you.
The stated top prize sits at five thousand times the stake, and it is a ceiling rather than a target. Most sessions finish well below it, and the multiplier growth in the free spins is what carries a round that far. Treat it as the outer limit of the game, never as an expectation.